daemon_interop.py drives a running secs_gemd through BOTH faces at once: a
gRPC tool client and a secsgem-py active host. Proves the gRPC<->HSMS bridge
against a reference GEM implementation, not just in-process:
- gRPC GetControlState agrees with the HSMS-driven control state
- gRPC SetVariables(ChamberPressure=2.5) + FireEvent(ProcessStarted) makes
the host receive S6F11 CEID 300 carrying 2.5 (value flowed gRPC -> engine
-> HSMS -> host)
- unknown variable/event names rejected at the gRPC edge
Mirrors the existing host_vs_cpp_server.py pattern. New 'gemd' compose service
(HSMS :5000 + gRPC :50051); interop image gains grpcio/grpcio-tools (proto
stubs generated at runtime, flat to avoid the secsgem package-name clash).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
